TeamViewer has been steadily updating its free remote-desktop app for the iPhone and iPad with big features ever since it first hit the App Store over a year ago. This big new update adds another meaty treat: the ability to transfer files back and forth between your iDevice and a Mac (or PC).
Which means that, as long as your computer is left on back home, you should be able to retrieve any missing file over the Internet (or snatch a file from your iDevice). And yes, it’s still free; the catch is that wholesale, enterprise use of the app is expected to be paid for — to the tune of $100 for the iPhone app, and $140 for the iPad version.
TeamViewer also works with Windows and Linux boxes, and yes, even with Lion.